wife and child Australia citizenship

Hi all, I and my family are permanent resident and eligible for citizenship now. I will like to take some more time for citizenship but my wife wants to take citizenship with our child.

I am the primary applicant in the PR application. Can my wife and child go for citizenship application without me? if yes, do my wife need to create her own immi account and the apply for it? or this needs to be applied from my immi account through which we got permanent resident visa? Please help.

Please also suggest if there is any problem (now or in future) if they will file citizenship application without me. Thank you.